Nozzle for metal-pouring ladles



Patented Feb. 18, 1930 UNITED STATES WILLIAM T. SCHAUP,' OF SWISSVALE,PENNSYLVANIA NOZZLE FOR METAL-POURING LADIES Application filed April 10,

This invention 'relates to the pouringof molten metals and moreparticularly to nozzles for pouring ladles used in the steel industry.

Well known difficulties are encountered in pouring steel, in particular,due in part to the splashing of the metal on thesides of the mold andthe formation of cinder and of blow-holes or piping in the metal.

It is thus' an object of this invention to provide a nozzle of suchcharacter as will prevent splashing on the sides of themold,

reduce the static pressure on the metal as it leaves the ladle thusmaking it possible to pour the metal more slowly, tend to eliminatescabs, thus reducing waste, and partially or wholly eliminate blow-holesor piping,

thus improving the grade of the molded product.

The invention, its 'object and advantages will be best understood bythose skilled in the art from the accompanying drawing in which,

Figure 1 is a vertical sectional View of the nozzle on line 1-1 ofFigure 2, and

Figura 2 a plan View.

Reference numeral A represents the nozzle and B the orifice of thenozzle. The orifice B comprises a substantially be1l-, orfrustroconical-shaped portion 1, a round portion 2 of substantially thesame diameter as the smaller end of the portion 1 and a substantiallysquare portion 3 which terminates at the outer end of the nozzle withoutthe walls of the ladle in which it is built. The 'outer end of thenozzle has should'ers 4 which preferably engage a suitable casting, (notshown), which in turn is riveted to the shell of the ladle in any wellknown manner. The nozzle A is const-ructed of any suitable refractorymaterial, either basic or acidic, depending on the character of thematerial under treatment. A good grade of magnesite is effective formany charges. The usual stopper, stopper rod, etc., are used as incommon practice, but these are not described as they form no part of thepresent invention.

It will be apparent that in operation, upon the withdrawal of thestopper, molten metal will enter the wide mouth of the frustro-coni-1928. Serial N'o. 2e9,oo4.

cal portion l and will converge until it enters the circular portion 2.Upon leaving the portion 2 the molten metal enters the substantiallylarger square portion 3 where it expands, and through which it flows inan even stream. This is of great advantage in that it overcomes unduespreading or splashing of the metal on the sides of the molds andthusavoids the formation of rough or scabby ingots. Furthermore, theformation of icicles or the like is largely eliminated. Chipping costsare also reduced.

Owing to the increased cross-sectional area of the orifice for asubstantial distance adjacent its outlet, the metal may be poured moreslowly in a quieter flow, .due it is thought to the decrease in thepressure on the molten metal in this section of the nozzle. Moreover,this Construction makes it possible to pour he metal at a lowertemperature.

The benefits to be derived from the use ofthe nozzle of the presentinvention will be apparent to those skilled in the art.

What I claim is:

In a ladle for pouring molten metal, a nozzle having an orificeextending therethrough and having a pluralityof sections of unlikecross-section, the outlet section being square throughout, and thesection immediately adjoining said outlet section being circular and oflesser cross-sectional area than that of the outlet section whereby thevelocity of liquid passing through said orifice is abrupt ly changed onentering and traversing said outlet section. r

In testimony whereof I have afiixed my signature'. y a

WVILLIAM T. SCHAUP.

